SIP Cylinder Head for Vespa T5 – newly manufactured aluminum cylinder head for original, POLINI, and MALOSSI cylinders.
When PIAGGIO & Co. are phasing out the T5 as the queen of the 125cc class, you’ll just have to make the Cylinder Heads yourself. That’s why SIP has the Cylinder Head for the Vespa T5 remanufactured using custom-made molds.
- Compatible with original, POLINI, and MALOSSI cylinders
- Combustion chamber optimally matched to piston shape and bore
- Threaded hole for KOSO temperature sensor
- O-ring seal included, depending on the version
The layout is optimally adapted to the respective piston shape and cylinder bore. The compression ratio and squish edge are precisely matched to the respective cylinders. Cylinder heads are available for the MALOSSI 172, the POLINI 152, and the original cylinder. Depending on the version, the cylinder heads are equipped with an O-ring gasket.
There is a threaded hole on the side into which a KOSO temperature sensor can be screwed. The cylinder head temperature can be read and monitored on the handlebars using a Temperature Gauge or a SIP Speedometer.
The SIP Cylinder Heads deliver particularly excellent results on tuned engines. The higher compression ratio provides more power across all RPM ranges and higher peak power. The engines still run reliably without compromising service life. Combined with a Racing Exhaust like the SIP Road, the T5 becomes a well-balanced touring scooter that can handle even longer stretches of full-throttle riding.
Technical Details
- Material: Cast aluminum
- Bore: Ø 56.0–66.0 mm, depending on the version
- For long-thread Spark Plug
- Compression edge: 1.2 mm
- Compression ratio: 10.5:1–12.5:1, depending on the model
- With O-Ring, depending on model
- With thread for KOSO temperature sensor
- Compatible with Vespa T5 original, POLINI, and MALOSSI cylinders
Conclusion: More power, better control of cylinder head temperature, and a precisely tuned combustion chamber make the SIP Cylinder Head a powerful solution for Vespa T5 engines.
